Optimizing the removal of phosphate from agricultural drains water using activated sugarcane bagasse hydrocar

Document Type : Original Article

Authors

1 Researcher. Faculty of Water Sciences Engineering, Shahid Chamran University of Ahvaz- Iran National Science Foundation.

2 Professor of Irrigation and Drainage, Faculty of Water Engineering, Shahid Chamran University of Ahvaz

Abstract

Treatment of Polluted wastewater is one of the most important ways to improve environmental pollution and in addition, it will lead to the effective management of organic solid waste. The aim of this study is to remove phosphate from agricultural wastewater by adsorption method and optimizing the parameters that affect adsorption. After preparing the activated sugarcane bagasse hydrocar, its various characteristics as a new adsorbent were determined using SEM, FTIR, XRF, and CHNSO. Then, the optimization of the adsorption parameters was done by examining the effect of changing the parameters of pH, adsorbent dosage, temperature, competing ions, and contact time on the phosphate adsorption process. Laboratory data were simulated with different kinetic models (Lagergren, Ho et al and Avrami) and isotherms (Langmuir, Freundlich, and Redlich- Peterson). The results showed that the optimal pH for the absorption of phosphate was 6, the optimal adsorbent value was 1 g/L, and the best contact time was 180 min. The increasing temperature increased the amount of removed phosphate and among the competing anions, sulphate had the greatest effect, and carbonate had the least effect on phosphate removal. The maximum adsorption capacity of phosphate under optimal conditions by activated sugarcane bagasse hydrocar was (54.69 mg/g). Among the kinetic and isotherm models, Ho et al and Langmuir model simulated laboratory data very well.

Keywords

References

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Iranian Journal of Irrigation & Drainage
Volume 14, Issue 5 - Serial Number 83
January and February 2021
Pages 1853-1865

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